N录音 output stream

Question

First I initialize it

WaveIn waveInStream = new WaveIn();
waveInStream.WaveFormat = new WaveFormat(44100, 2);
waveInStream.BufferMilliseconds = 36000000;  

waveInStream.DeviceNumber = 0;

waveInStream.DataAvailable += WaveInStream_DataAvailable;
waveInStream.RecordingStopped += WaveInStream_RecordingStopped;

WaveFileWriter wave_writer = new WaveFileWriter(full_file_path, waveInStream.WaveFormat);

On waveInStream.StartRecording(); I get an exception - BadDeviceId calling waveInOpen. And I see WaveIn.DeviceCount = 0; But I don't need an actual input device like mic, I want to record sound I generate and pass to a sound card output. How should I set waveInStream to do it?

Answer 1

I did like I was suggested

MMDevice mm_dev;

private void MainForm_Load(object sender, EventArgs e)
{
    if (OutputDevice.DeviceCount > 0)
    {
        outDevice = new OutputDevice(0);

        MMDeviceEnumerator enumerator = new MMDeviceEnumerator();
        //here I see my sound card
        mm_dev = enumerator.EnumerateAudioEndPoints(DataFlow.All, DeviceState.Active)[0];

         loopback_capture = new WasapiLoopbackCapture(mm_dev);
         loopback_capture.DataAvailable += Loopback_capture_DataAvailable;
         loopback_capture.RecordingStopped += Loopback_capture_RecordingStopped;
         
         wave_writer = new WaveFileWriter(full_file_path, waveInStream.WaveFormat);
    }
}

private void Loopback_capture_DataAvailable(object sender, WaveInEventArgs e)
{
     wave_writer.Write(e.Buffer, 0, e.BytesRecorded);
}

But on loopback_capture.StartRecording(); I get -

Value does not fall within the expected range.

What do I miss?